blob: 1de4fb73f7d6656832743dca762e74acab1fe522 [file] [log] [blame]
Damjan Marion8389fb92017-10-13 18:29:53 +02001/*
2 *------------------------------------------------------------------
3 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
16 */
17
18#include <sys/types.h>
19#include <sys/stat.h>
20#include <fcntl.h>
21#include <net/if.h>
22#include <linux/if_tun.h>
23#include <sys/ioctl.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020024#include <sys/eventfd.h>
25
26#include <vlib/vlib.h>
27#include <vlib/unix/unix.h>
28#include <vnet/ethernet/ethernet.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020029#include <vnet/feature/feature.h>
Damjan Marion94100532020-11-06 23:25:57 +010030#include <vnet/interface/rx_queue_funcs.h>
Milan Lenco73e7f422017-12-14 10:04:25 +010031#include <vnet/ip/ip4_packet.h>
32#include <vnet/ip/ip6_packet.h>
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020033#include <vnet/udp/udp_packet.h>
Neale Rannsf7040f02022-02-15 09:02:27 +000034#include <vnet/tcp/tcp_packet.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020035#include <vnet/devices/virtio/virtio.h>
Mohsin Kazmi6799f9b2021-04-28 18:55:45 +020036#include <vnet/devices/virtio/virtio_inline.h>
Damjan Marion8389fb92017-10-13 18:29:53 +020037
38static char *virtio_input_error_strings[] = {
Mohsin Kazmi6799f9b2021-04-28 18:55:45 +020039#define _(n, s) s,
Damjan Marion8389fb92017-10-13 18:29:53 +020040 foreach_virtio_input_error
41#undef _
42};
43
44typedef struct
45{
46 u32 next_index;
47 u32 hw_if_index;
48 u16 ring;
49 u16 len;
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +000050 vnet_virtio_net_hdr_v1_t hdr;
Damjan Marion8389fb92017-10-13 18:29:53 +020051} virtio_input_trace_t;
52
53static u8 *
54format_virtio_input_trace (u8 * s, va_list * args)
55{
56 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
57 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
58 virtio_input_trace_t *t = va_arg (*args, virtio_input_trace_t *);
59 u32 indent = format_get_indent (s);
60
61 s = format (s, "virtio: hw_if_index %d next-index %d vring %u len %u",
62 t->hw_if_index, t->next_index, t->ring, t->len);
63 s = format (s, "\n%Uhdr: flags 0x%02x gso_type 0x%02x hdr_len %u "
64 "gso_size %u csum_start %u csum_offset %u num_buffers %u",
65 format_white_space, indent + 2,
66 t->hdr.flags, t->hdr.gso_type, t->hdr.hdr_len, t->hdr.gso_size,
67 t->hdr.csum_start, t->hdr.csum_offset, t->hdr.num_buffers);
68 return s;
69}
70
71static_always_inline void
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +000072virtio_needs_csum (vlib_buffer_t *b0, vnet_virtio_net_hdr_v1_t *hdr,
73 u8 *l4_proto, u8 *l4_hdr_sz, virtio_if_type_t type)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020074{
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020075 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +020076 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +020077 u16 ethertype = 0, l2hdr_sz = 0;
Mohsin Kazmi36f7a6a2021-05-05 14:26:38 +020078 vnet_buffer_oflags_t oflags = 0;
Mohsin Kazmi38b09682020-06-03 18:20:17 +020079
80 if (type == VIRTIO_IF_TYPE_TUN)
81 {
82 switch (b0->data[0] & 0xf0)
83 {
84 case 0x40:
85 ethertype = ETHERNET_TYPE_IP4;
86 break;
87 case 0x60:
88 ethertype = ETHERNET_TYPE_IP6;
89 break;
90 }
91 }
92 else
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +020093 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +020094 ethernet_header_t *eh =
95 (ethernet_header_t *) vlib_buffer_get_current (b0);
96 ethertype = clib_net_to_host_u16 (eh->type);
97 l2hdr_sz = sizeof (ethernet_header_t);
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +020098
Mohsin Kazmi206acf82020-04-06 14:19:54 +020099 if (ethernet_frame_is_tagged (ethertype))
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +0200100 {
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200101 ethernet_vlan_header_t *vlan =
102 (ethernet_vlan_header_t *) (eh + 1);
103
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +0200104 ethertype = clib_net_to_host_u16 (vlan->type);
105 l2hdr_sz += sizeof (*vlan);
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200106 if (ethertype == ETHERNET_TYPE_VLAN)
107 {
108 vlan++;
109 ethertype = clib_net_to_host_u16 (vlan->type);
110 l2hdr_sz += sizeof (*vlan);
111 }
112 }
113 }
Mohsin Kazmi14bea1b2019-07-29 11:39:26 +0200114
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100115 vnet_buffer (b0)->l2_hdr_offset = 0;
116 vnet_buffer (b0)->l3_hdr_offset = l2hdr_sz;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200117
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200118 if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
119 {
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200120 ip4_header_t *ip4 =
121 (ip4_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100122 vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100123 *l4_proto = ip4->protocol;
Mohsin Kazmi68095382021-02-10 11:26:24 +0100124 oflags |= VNET_BUFFER_OFFLOAD_F_IP_CKSUM;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200125 b0->flags |=
Mohsin Kazmi68095382021-02-10 11:26:24 +0100126 (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
127 VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100128 VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200129 }
130 else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
131 {
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200132 ip6_header_t *ip6 =
133 (ip6_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100134 vnet_buffer (b0)->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200135 /* FIXME IPv6 EH traversal */
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100136 *l4_proto = ip6->protocol;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100137 b0->flags |= (VNET_BUFFER_F_IS_IP6 |
138 VNET_BUFFER_F_L2_HDR_OFFSET_VALID
139 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
140 VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200141 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100142 if (*l4_proto == IP_PROTOCOL_TCP)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200143 {
Mohsin Kazmi68095382021-02-10 11:26:24 +0100144 oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100145 tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
146 vnet_buffer
147 (b0)->l4_hdr_offset);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100148 *l4_hdr_sz = tcp_header_bytes (tcp);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200149 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100150 else if (*l4_proto == IP_PROTOCOL_UDP)
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200151 {
Mohsin Kazmi68095382021-02-10 11:26:24 +0100152 oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100153 udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
154 vnet_buffer
155 (b0)->l4_hdr_offset);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100156 *l4_hdr_sz = sizeof (*udp);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200157 }
Mohsin Kazmi68095382021-02-10 11:26:24 +0100158 if (oflags)
159 vnet_buffer_offload_flags_set (b0, oflags);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200160 }
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100161}
162
163static_always_inline void
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000164fill_gso_buffer_flags (vlib_buffer_t *b0, vnet_virtio_net_hdr_v1_t *hdr,
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100165 u8 l4_proto, u8 l4_hdr_sz)
166{
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200167 if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV4)
168 {
169 ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
170 vnet_buffer2 (b0)->gso_size = hdr->gso_size;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100171 vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200172 b0->flags |= VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP4;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200173 }
174 if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV6)
175 {
176 ASSERT (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM);
177 vnet_buffer2 (b0)->gso_size = hdr->gso_size;
Mohsin Kazmi157a4ab2019-12-06 15:47:48 +0100178 vnet_buffer2 (b0)->gso_l4_hdr_sz = l4_hdr_sz;
Mohsin Kazmi72e73122019-10-22 13:33:13 +0200179 b0->flags |= VNET_BUFFER_F_GSO | VNET_BUFFER_F_IS_IP6;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200180 }
181}
182
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100183static_always_inline u16
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000184virtio_n_left_to_process (vnet_virtio_vring_t *vring, const int packed)
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100185{
186 if (packed)
187 return vring->desc_in_use;
188 else
189 return vring->used->idx - vring->last_used_idx;
190}
191
192static_always_inline u16
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000193virtio_get_slot_id (vnet_virtio_vring_t *vring, const int packed, u16 last,
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100194 u16 mask)
195{
196 if (packed)
197 return vring->packed_desc[last].id;
198 else
199 return vring->used->ring[last & mask].id;
200}
201
202static_always_inline u16
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000203virtio_get_len (vnet_virtio_vring_t *vring, const int packed, const int hdr_sz,
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100204 u16 last, u16 mask)
205{
206 if (packed)
207 return vring->packed_desc[last].len - hdr_sz;
208 else
209 return vring->used->ring[last & mask].len - hdr_sz;
210}
211
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000212#define increment_last(last, packed, vring) \
213 do \
214 { \
215 last++; \
216 if (packed && last >= vring->queue_size) \
217 { \
218 last = 0; \
219 vring->used_wrap_counter ^= 1; \
220 } \
221 } \
222 while (0)
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100223
Damjan Marion8389fb92017-10-13 18:29:53 +0200224static_always_inline uword
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000225virtio_device_input_gso_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
226 vlib_frame_t *frame, virtio_if_t *vif,
227 vnet_virtio_vring_t *vring,
228 virtio_if_type_t type, int gso_enabled,
229 int checksum_offload_enabled, int packed)
Damjan Marion8389fb92017-10-13 18:29:53 +0200230{
231 vnet_main_t *vnm = vnet_get_main ();
Damjan Marion067cd622018-07-11 12:47:43 +0200232 u32 thread_index = vm->thread_index;
Damjan Marion8389fb92017-10-13 18:29:53 +0200233 uword n_trace = vlib_get_trace_count (vm, node);
Damjan Mariond96b28a2020-10-19 17:15:58 +0200234 u32 next_index;
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200235 const int hdr_sz = vif->virtio_net_hdr_sz;
Damjan Marion8389fb92017-10-13 18:29:53 +0200236 u32 *to_next = 0;
237 u32 n_rx_packets = 0;
238 u32 n_rx_bytes = 0;
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000239 u16 mask = vring->queue_size - 1;
Damjan Marion8389fb92017-10-13 18:29:53 +0200240 u16 last = vring->last_used_idx;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100241 u16 n_left = virtio_n_left_to_process (vring, packed);
Mohsin Kazmi62594062021-11-05 16:13:57 +0000242 vlib_buffer_t bt = {};
Damjan Marion8389fb92017-10-13 18:29:53 +0200243
244 if (n_left == 0)
Damjan Marion4769ed92020-10-18 14:00:43 +0200245 return 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200246
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200247 if (type == VIRTIO_IF_TYPE_TUN)
Damjan Mariond96b28a2020-10-19 17:15:58 +0200248 {
249 next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
250 }
251 else
252 {
253 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
254 if (PREDICT_FALSE (vif->per_interface_next_index != ~0))
255 next_index = vif->per_interface_next_index;
256
257 /* only for l2, redirect if feature path enabled */
258 vnet_feature_start_device_input_x1 (vif->sw_if_index, &next_index, &bt);
259 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200260
Damjan Marion8389fb92017-10-13 18:29:53 +0200261 while (n_left)
262 {
263 u32 n_left_to_next;
264 u32 next0 = next_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200265
Damjan Marion8389fb92017-10-13 18:29:53 +0200266 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
267
268 while (n_left && n_left_to_next)
269 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100270 if (packed)
271 {
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000272 vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[last];
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100273 u16 flags = d->flags;
274 if ((flags & VRING_DESC_F_AVAIL) !=
275 (vring->used_wrap_counter << 7)
276 || (flags & VRING_DESC_F_USED) !=
277 (vring->used_wrap_counter << 15))
278 {
279 n_left = 0;
280 break;
281 }
282 }
Mohsin Kazmi516e4ed2020-02-24 15:54:24 +0100283 u8 l4_proto = 0, l4_hdr_sz = 0;
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200284 u16 num_buffers = 1;
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000285 vnet_virtio_net_hdr_v1_t *hdr;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100286 u16 slot = virtio_get_slot_id (vring, packed, last, mask);
287 u16 len = virtio_get_len (vring, packed, hdr_sz, last, mask);
Damjan Marion8389fb92017-10-13 18:29:53 +0200288 u32 bi0 = vring->buffers[slot];
289 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200290 hdr = vlib_buffer_get_current (b0);
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000291 if (hdr_sz == sizeof (vnet_virtio_net_hdr_v1_t))
Mohsin Kazmid6c15af2018-10-23 18:00:47 +0200292 num_buffers = hdr->num_buffers;
Damjan Marion8389fb92017-10-13 18:29:53 +0200293
Mohsin Kazmi8975dbd2020-06-24 16:19:19 +0200294 b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200295 b0->current_data = 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200296 b0->current_length = len;
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200297
Mohsin Kazmi6d4af892020-01-03 15:11:53 +0000298 if (checksum_offload_enabled)
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200299 virtio_needs_csum (b0, hdr, &l4_proto, &l4_hdr_sz, type);
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100300
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200301 if (gso_enabled)
BenoƮt Ganne15d7fd02019-11-26 17:59:41 +0100302 fill_gso_buffer_flags (b0, hdr, l4_proto, l4_hdr_sz);
Andrew Yourtchenko6a7cff72018-10-12 16:09:22 +0200303
Damjan Marion8389fb92017-10-13 18:29:53 +0200304 vnet_buffer (b0)->sw_if_index[VLIB_RX] = vif->sw_if_index;
305 vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
306
307 /* if multisegment packet */
308 if (PREDICT_FALSE (num_buffers > 1))
309 {
310 vlib_buffer_t *pb, *cb;
311 pb = b0;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200312 b0->total_length_not_including_first_buffer = 0;
Damjan Marion8389fb92017-10-13 18:29:53 +0200313 while (num_buffers > 1)
314 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100315 increment_last (last, packed, vring);
316 u16 cslot = virtio_get_slot_id (vring, packed, last, mask);
Mohsin Kazmia17381a2020-12-03 11:35:23 +0100317 /* hdr size is 0 after 1st packet in chain buffers */
318 u16 clen = virtio_get_len (vring, packed, 0, last, mask);
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100319 u32 cbi = vring->buffers[cslot];
Damjan Marion8389fb92017-10-13 18:29:53 +0200320 cb = vlib_get_buffer (vm, cbi);
321
322 /* current buffer */
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100323 cb->current_length = clen;
Damjan Marion8389fb92017-10-13 18:29:53 +0200324
325 /* previous buffer */
326 pb->next_buffer = cbi;
327 pb->flags |= VLIB_BUFFER_NEXT_PRESENT;
328
329 /* first buffer */
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100330 b0->total_length_not_including_first_buffer += clen;
Damjan Marion8389fb92017-10-13 18:29:53 +0200331
332 pb = cb;
333 vring->desc_in_use--;
334 num_buffers--;
335 n_left--;
336 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200337 len += b0->total_length_not_including_first_buffer;
Damjan Marion8389fb92017-10-13 18:29:53 +0200338 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200339
340 if (type == VIRTIO_IF_TYPE_TUN)
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200341 {
342 switch (b0->data[0] & 0xf0)
343 {
344 case 0x40:
345 next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
346 break;
347 case 0x60:
348 next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
349 break;
350 default:
351 next0 = VNET_DEVICE_INPUT_NEXT_DROP;
352 break;
353 }
Damjan Mariond96b28a2020-10-19 17:15:58 +0200354
355 if (PREDICT_FALSE (vif->per_interface_next_index != ~0))
356 next0 = vif->per_interface_next_index;
Mohsin Kazmi206acf82020-04-06 14:19:54 +0200357 }
Damjan Mariond96b28a2020-10-19 17:15:58 +0200358 else
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200359 {
Damjan Mariond96b28a2020-10-19 17:15:58 +0200360 /* copy feature arc data from template */
361 b0->current_config_index = bt.current_config_index;
362 vnet_buffer (b0)->feature_arc_index =
363 vnet_buffer (&bt)->feature_arc_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200364 }
Damjan Marion06c194d2019-11-13 10:12:53 +0100365
Damjan Marion8389fb92017-10-13 18:29:53 +0200366 /* trace */
BenoƮt Ganne9a3973e2020-10-02 19:36:57 +0200367 if (PREDICT_FALSE (n_trace > 0 && vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */
368 1)))
Damjan Marion8389fb92017-10-13 18:29:53 +0200369 {
370 virtio_input_trace_t *tr;
Damjan Marion8389fb92017-10-13 18:29:53 +0200371 vlib_set_trace_count (vm, node, --n_trace);
372 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
373 tr->next_index = next0;
374 tr->hw_if_index = vif->hw_if_index;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200375 tr->len = len;
Mohsin Kazmi049a2ea2021-11-11 19:17:27 +0100376 clib_memcpy_fast (&tr->hdr, hdr, (hdr_sz == 12) ? 12 : 10);
Damjan Marion8389fb92017-10-13 18:29:53 +0200377 }
378
379 /* enqueue buffer */
380 to_next[0] = bi0;
381 vring->desc_in_use--;
382 to_next += 1;
383 n_left_to_next--;
384 n_left--;
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100385 increment_last (last, packed, vring);
Damjan Marion8389fb92017-10-13 18:29:53 +0200386
Damjan Mariond96b28a2020-10-19 17:15:58 +0200387 /* only tun interfaces may have different next index */
388 if (type == VIRTIO_IF_TYPE_TUN)
389 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
390 n_left_to_next, bi0, next0);
Damjan Marion8389fb92017-10-13 18:29:53 +0200391
392 /* next packet */
393 n_rx_packets++;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200394 n_rx_bytes += len;
Damjan Marion8389fb92017-10-13 18:29:53 +0200395 }
396 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
397 }
398 vring->last_used_idx = last;
399
400 vlib_increment_combined_counter (vnm->interface_main.combined_sw_if_counters
401 + VNET_INTERFACE_COUNTER_RX, thread_index,
Steven Luongefa119d2019-08-30 10:49:44 -0700402 vif->sw_if_index, n_rx_packets,
Damjan Marion8389fb92017-10-13 18:29:53 +0200403 n_rx_bytes);
404
Damjan Marion8389fb92017-10-13 18:29:53 +0200405 return n_rx_packets;
406}
407
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200408static_always_inline uword
409virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
410 vlib_frame_t * frame, virtio_if_t * vif, u16 qid,
411 virtio_if_type_t type)
412{
Mohsin Kazmi0f8912f2022-02-01 18:35:59 +0000413 vnet_virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
Damjan Marion4769ed92020-10-18 14:00:43 +0200414 const int hdr_sz = vif->virtio_net_hdr_sz;
Damjan Marion4769ed92020-10-18 14:00:43 +0200415 uword rv;
416
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100417 if (vif->is_packed)
418 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100419 if (vif->gso_enabled)
420 rv =
421 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
422 1, 1, 1);
423 else if (vif->csum_offload_enabled)
424 rv =
425 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
426 0, 1, 1);
427 else
428 rv =
429 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
430 0, 0, 1);
431
432 virtio_refill_vring_packed (vm, vif, type, vring, hdr_sz,
433 node->node_index);
434 }
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200435 else
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100436 {
Mohsin Kazmib977d3f2020-11-16 16:49:30 +0100437 if (vif->gso_enabled)
438 rv =
439 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
440 1, 1, 0);
441 else if (vif->csum_offload_enabled)
442 rv =
443 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
444 0, 1, 0);
445 else
446 rv =
447 virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
448 0, 0, 0);
449
450 virtio_refill_vring_split (vm, vif, type, vring, hdr_sz,
451 node->node_index);
452 }
Damjan Marion4769ed92020-10-18 14:00:43 +0200453 return rv;
Mohsin Kazmi38b09682020-06-03 18:20:17 +0200454}
455
Filip Tehlar608996d2019-03-04 03:03:13 -0800456VLIB_NODE_FN (virtio_input_node) (vlib_main_t * vm,
457 vlib_node_runtime_t * node,
458 vlib_frame_t * frame)
Damjan Marion8389fb92017-10-13 18:29:53 +0200459{
460 u32 n_rx = 0;
Damjan Marion94100532020-11-06 23:25:57 +0100461 virtio_main_t *vim = &virtio_main;
462 vnet_hw_if_rxq_poll_vector_t *p,
463 *pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
Damjan Marion8389fb92017-10-13 18:29:53 +0200464
Damjan Marion94100532020-11-06 23:25:57 +0100465 vec_foreach (p, pv)
466 {
467 virtio_if_t *vif;
468 vif = vec_elt_at_index (vim->interfaces, p->dev_instance);
469 if (vif->flags & VIRTIO_IF_FLAG_ADMIN_UP)
470 {
471 if (vif->type == VIRTIO_IF_TYPE_TAP)
472 n_rx += virtio_device_input_inline (
473 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_TAP);
474 else if (vif->type == VIRTIO_IF_TYPE_PCI)
475 n_rx += virtio_device_input_inline (
476 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_PCI);
477 else if (vif->type == VIRTIO_IF_TYPE_TUN)
478 n_rx += virtio_device_input_inline (
479 vm, node, frame, vif, p->queue_id, VIRTIO_IF_TYPE_TUN);
480 }
481 }
Damjan Marion8389fb92017-10-13 18:29:53 +0200482
483 return n_rx;
484}
485
486/* *INDENT-OFF* */
487VLIB_REGISTER_NODE (virtio_input_node) = {
Damjan Marion8389fb92017-10-13 18:29:53 +0200488 .name = "virtio-input",
489 .sibling_of = "device-input",
490 .format_trace = format_virtio_input_trace,
Damjan Marion7ca5aaa2019-09-24 18:10:49 +0200491 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
Damjan Marion8389fb92017-10-13 18:29:53 +0200492 .type = VLIB_NODE_TYPE_INPUT,
493 .state = VLIB_NODE_STATE_INTERRUPT,
Mohsin Kazmiddd21832019-01-22 13:05:00 +0000494 .n_errors = VIRTIO_INPUT_N_ERROR,
Damjan Marion8389fb92017-10-13 18:29:53 +0200495 .error_strings = virtio_input_error_strings,
496};
Damjan Marion8389fb92017-10-13 18:29:53 +0200497/* *INDENT-ON* */
498
499/*
500 * fd.io coding-style-patch-verification: ON
501 *
502 * Local Variables:
503 * eval: (c-set-style "gnu")
504 * End:
505 */